# à partir de la position 'random' la fonction choisit à gauche de cette position les
# autres SNP avec une distance >= pas entre tous les SNPs
selectMarkerDownstream <- function(x, vector, pas, random, unit)
{
marker <- random
if(unit=="Bases") #get the distance to find which are the nearest markers
dist <- x@snps$pos[vector[1]:vector[2]]
else
dist <- x@snps$dist[vector[1]:vector[2]]
seg <- c((vector[1]:vector[2])[marker])
while (marker > 1) {
marker_dist <- dist[marker] #get the dist of the random marker
d <- abs( dist - marker_dist )
ds <- which ( d[1:marker] > 0.5 )
if (length(ds) == 0) {
marker <- 0
} else {
min_marker <- which ( d == min(d[ds]) )
if (length(min_marker) > 1) {
marker <- sample(min_marker,1)
} else {
marker <- which ( d == min(d[ds]) )
}
}
seg <- c( (vector[1]:vector[2])[marker], seg )
}
return(seg)
}
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